In terms of line-up balance, I think it makes more sense to bring Kanter off the bench. With Kemba, Brown, Hayward, and Tatum needing shots, there aren't going to be a lot of opportunities for him. Starting somebody like Theis/Poirier/Timelord (not ready, I know) gives the Cs more of a defensive presence - which is needed with Tatum/Hayward on the front line - while also punting offensive touches from the equation for our starting Center.
I am sure Stevens has had conversations with Kanter about this already. He has feasted on bench line-ups his whole career while playing decent minutes. I expect he will be fine as long as he is playing. A Smart/Kanter/Edwards line-up off the bench should be pretty electric. Williams is probably included in that group for balance and I honestly wouldn't be surprised to see Green push his way up the depth chart, too.
No matter what, it should be a fun season, and Kanter should play a big role in that!